There was no change in mass whenever a reaction occurred. This is explained also in Dalton’s theory, that if there are the same numbers of atoms before the reaction and after then the masses should be same (Hogg 2014). Another experiment was by Louis (1754-1826). He stated that whenever a compound was purified, it always had the same elements in the same mass ratio. Dalton explains this by stating that the total mass of the materials present after any chemical reaction is the mass present

Next he also said that compounds are made up of atoms combining in a fixed ratio and lastly, he proposed that chemical reactions merely include the rearrangement of the constituent particles (Thompson, 1807).On a personal level, I think that Dalton’s work is truly pioneering and phenomenal since a simple evaporation of water instilled questions in his mind about the existence of smaller particles. One of the major drawbacks that can be seen in his experiments is that he bound himself to